Polymer Bulletin

, Volume 33, Issue 5, pp 585–589 | Cite as

Electron spin resonance investigation of filler orientation in compression and injection molded polypropylene based composites

  • A. Rockenbauer
  • L. Korecz
  • B. Pukánszky
Article
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Summary

Electron Spin Resonance (ESR) spectroscopy was applied for monitoring the orientation and distribution of filler particles in polymer composites by measuring the magnetic anisotropy of naturally occuring Mn(II) centers in CaCO3 and in talc. The amplitude ratio of characteristic ESR bands gives the order parameter. The orientation of the particles changes as a function of composition, dependends on processing technology, the type of molding (injection vs compression molding) and has a specific spatial distribution in the cross-section of the injection molded specimen. Correlation is found between average orientation of anisotropic particles and the mechanical properties of various composites.

Keywords

Mold Electron Spin Resonance Polypropylene CaCO3 Talc 
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Copyright information

© Springer-Verlag 1994

Authors and Affiliations

  • A. Rockenbauer
    • 1
  • L. Korecz
    • 1
  • B. Pukánszky
    • 1
  1. 1.Central Research Institute for ChemistryHungarian Academy of SciencesBudapestHungary

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